Alaska Marmot in a grassy area of the refuge. The Arctic National Wildlife Refuge, a vast and beautiful wilderness, is an intact continuum of six different ecological zones spanning some 200 miles north to south. Such a diverse spectrum of...

Alaska marmot in a grassy area of the refuge. The Arctic National Wildlife Refuge, a vast and beautiful wilderness, is an intact continuum of six different ecological zones spanning some 200 miles north to south. Such a diverse spectrum of...

Dall sheep on a steep slope at Arctic National Wildlife Refuge. This refuge is a vast and beautiful wilderness with an intact continuum of six different ecological zones spanning some 200 miles north to south. Such a diverse spectrum of habitats...

Muskoxen facing towards the camera. The Arctic National Wildlife Refuge, a vast and beautiful wilderness, is an intact continuum of six different ecological zones spanning some 200 miles north to south. Such a diverse spectrum of habitats and...